Miniature phonograph



March 24, 1936. J. H. WILHELM MINIATURE PHONOGRAPH Filed March 27, 19342 Sheets-Sheet 1 INVEN-ljon John H. Wllhelm ATTORNEYS March 24, 1936. J.H. WILHELM MINIATURE PHONOGRPH` Filed March 27, 1934 2 She'ets-'Sheet 2Auftritt ATTORNEYS INVENTOR John H. Wilhelm Patented` Mar. 24, 193.6l

UNITED s'rnis PATENT OFFICE MINIATURE `IHONOGRAPH John H. Wilhelm;Hamilton Beach, Long 4Island, N. Y., assignor to Voices, Incorporated,Newark, N. J., a corporation of Delaware v `Application March 27, 1934,Serial N0'. 717,590

26 Claims. (01.' 274-4) I This invention relates to phonographs, and Tothe accomplishment ofthe foregoing and more particularly to a short4record miniature such other objects as will hereinafter appear,phonograph. j my invention consists in the miniature phono- The objectof the present invention, generally, graph elements and their relationone to another,

is to provide a simple form of miniature-phono;- as hereinafter are moreparticularly described graph suitable for useas an advertising noveltyin the specication and sought to be dened in or toy, orlfor use in(1011s, the claims. The specification is' accompanied by Dolls haveheretofore beenprovided with indrawingsin Whichz expensive voices, suchas a crier, and the bellows Fig. 1 is a section taken through aphonograph m of such voices have also been valved to articulateembodying features 0f 'my invention;

a simple word like Mama; but reproduction Fig. 2 is a section taken inthe plane of the line i0 of true speech has not beenobtainable. In one2-2 0f Fig. 1 and Showing the drive mechanism; aspect, an object of myinvention Ais to produce Fig- 3 iS a Section taken in the Plane of theline an inexpensive short-playing voice' which 3-3 of Fig. land showsthe governor mechaenunciate true' speech. In the course ofconsiderniSln; 15

able experimentation and development of phono- Flg. 4 is a Section takenin the plane of the line graphs for dolls, I have been impressed withthe 4 5 0f Fig. 1 and illustrates the Single revolucomplexity of the'mechanisms vrequired for lift- V tion stop mechanism; ing and resettingthe stylus, partiomarlybeeeuse Fig. 5 is a section taken in the planeofi the the phonograph must playin'anypositionandmust line 5*-5 ofFig.'1; v 2o' be automatic or self-controlled. Cohsideredinan- Fig. 6 isa modication driven by a rack: other aspect, an object of my inventionis to elim- Fig. 'I is a modication driven by a crank: inate all suchmechanisms and to thereby greatly Fig. 8 ShOWS the reoold;

simplify the phonograph. I find that-by `com Fig..9 is a section througha modification; and pletely discarding the idea of simulating'the coniFig. 10 is a. section taken in the plane of the 25 struction andoperation of a large phonograph line ill-i0 0f=Fig.' 9.

A-on a small scale, I am enabled to fulll the fore- Refen'ing, i50 ,thedrawings the phonograph going objects by using a record having only aGOmPISeSa preferably ol/HndriCalaSing C havsingle continuouscircularsound groove, for such ing an open and a closed end,` o Vibratile dia-3o arecord maybe engaged byastylus permanently Dhragin D Which01059812116 Open end 0f the 30' mounted in one position. casing, a,sound record R located behind and sub- More particular objects of myinvention center Stantially parallel to the diaphragm D, Said recaboutthe sound reproducing mechanism per se', 0rd having only a Single soundgroove, as is and are: to providean inexpensive light-weight host Shownin Fig 8, a Sil/1115 S 'Permanently diaphragm; to eliminate thenecessity for a no1-n mounted for constant engagement with the sound 35or sound amplier; to enlarge the diaphragm g'looVeof record R,ogovelnol' G for regulating and the record to substantial diameter whilethe speed of the phonograph. and drive mechausing the same in a smallcompact casing; and A nism locatedat the closed end of casing-C.generallyto reduce the weight and cost of the Considering the phonographof Figs. 1-5 in 4o phonograph to a minimum while obtaining clear greaterdetail, the Casing C is'preferably made 4o 10nd sound reproductionthough of short duup of three dished or cup-like pieces of sheet ration.metal. The rst consists of a face portion l2 Further objects of myinvention center about and a iiange portion I4, the face portion I2bethe driving mechanism for the phonograph, and jing cut away for m'ostof its area, as is indicated are: to provide flat compact mechanism forroat I6, for freesound discharge. 'I'he second 'con- 4,5

tating the record; to eliminate, if desired, the j sists of a `face orend portion I8 and a ange 20. usual relatively heavy driving spring forrotat- The anges I and 20 are. telescopicallyrelated `ing the record; toprovide at compact inexpenand t together to form the exterior of thecassive yet effective governor mechanism; to insure `ing. `The thirdmember consists of a face porrotation of the record in only onedirection; and, tion 22 and a ange 24, the ilange 24 being di-- 50nally, to provide modied driving mechanisms mensioned to i'lt closelyWithin the ange 2li, and one of which may be suitable for rotating thethe disc 22 acting as a partition or bearing wailrecord only a singlerevolution at a time, while between the ends of the casing. A'plurality,say 4 another may be used for continuous rotation of three, tabs ofmetal 26 are struck from partition the record. 22 and bent outwardlyaway from flange 2d. At

corresponding points around the periphery of the casing,\the ange I4 iscut to form slots 28 which receive screws 30, the latter being threadedinto flange 20 and tabs 26. The screws 30 thus hold the parts I8 and 22in fixed relation, and also hold these parts in adjustable relation tothe outermost member I4.

The diaphragm D is preferably made of paper or light parchment, andgiven a conical shape such as has been highly developed for use in radioloud speakers. The edge portion 32 of the diaphragm is secured to thecasing within the face portion I2. The diaphragm is preferablycorrugated, as shown at 34, to increase the nexibility of the same. The-center 36 of the diaphragm is connected to a light stylus arm 38. 'I'hestylus arm is pivotally mounted near the casing wall. In the presentcase a thin leaf spring 40 is clamped at one end between the parts 38and 42 of the complete stylus arm, and is clamped at its other endbetween blocks 44 and 46 iixedly mounted on the casing wall. The stylusS is carried directly in the collar 42 of the stylus arm, and extendstoward and directly engages the record R. The stylus is, of course,located directly in the single sound groove 48 (see Fig. 8) of the,record. The contact pressure between the stylus and the record is xedwhen the phonograph is initially assembled, this being made possible byreason of the screw and slot construction 30, 28 heretofore referred to.The blocks 44, 46 supporting the stylus arm are preferably themselvesmounted'on a block 50 of rubber which is independently secured to thecasing wall. Such an intermediate cushion relieves the stylus ofexcessive pressure, should the initial adjustment be faulty or therecord be out of true. I have, however, obtained satisfactory resultseven with a rigid mounting directly upon the casing wall devoid of anyform of intermediate cushion. I

'I'he record R is here illustrated as a disc record having a lateralsound groove. The record is substantial in diameter, it having adiameter nearly equal to that of the casing, which, of course, isdesirable in order to obtain substantial sound reproduction while usingonly a single sound groove. 'Ihe record is backed up by a recordVsupport plate or table 52, and the record and table are clamped to arecord shaft 54 by means of a washer 56 and nut 58 which clamp therecord and record support against a collar 60 formed on the record shaft54. Record shaft 54 is rotatably supported in bearings formed at thecenter of the plates I8 and 22 of the casing.

The governor G comprises relatively large iiat weight arms 62 and 64,best shown in Fig. 3, which are respectively pivotally mounted at 66 and68 on the record support 52. Weight arm 64 carries a brake shoe I2adapted to ride directly on the inner cylindrical wall of ange 24 of thecasing. The weight arms 62 and 64 are interconnected by a link `'I4freely pivoted on the collar 60 of the record shaft. Link 14 insuressimultaneous opposite movement of the weight arms, so that the eect ofboth weight arms is applied to the brake shoe 12. It is preferred to usetwo or more Weight arms in symmetrical arrangement in order to balancethe governor mechanism. I nd it better to use a single brake shoe on oneof two interconnected arms, than to use separate brake shoes on twoindependently movable arms.

Much of the simplification of this governor arises from its beingmounted directly on the record support. and this in turn is madepossible because of the large dimension of the governor tviileights andthe large radius at which they func- The mechanism so far described iscommon to the phonographs of Figs. 6 and 7 as well as Fig. l, for thesespecies diifer only in the drive mechanism of the phonograph. Referringfirst to Figs. 1 through 5, I illustrate drive mechanism actuated by apull cord 80. This pull cord is -connected at 82 to a drum 84 aboutwhich it is wound. Drum 84 is mounted and freely rotatable on recordshaft 54. A spiral take-up spring 86 is connected to the casing at 88and to the drum at 90. The drum carries a stop arm 92, while the casingis provided with a stop 04 cooperating therewith, this stop being struckoutwardly from partition plate 22. It Will be evident that by pullingcord 80, the drum 84 may be rotated for a single revolution in onedirection, and that upon release o1' cord 80, the drum is rotated inopposite direction by spring 86. In the present case it is preferred todrive the phonograph while pulling the cord, so that the spring 86 maybe light and inexpensive. It is possible, however, to reverse thisarrangement and to use a heavy spring which itself drives thephonograph, the cord then serving merely to rewind the spring.

Rotation of the drum 84 is imparted to record shaft 54 through clutchmeans operating to drive the record in only one direction. For thispurpose the record shaft 54 is provided with an arm 96 forcibly drivenon the record shaft, and drum 84 is provided with a triangularprojection or driving pawl 98. Upon rotation of the drum in onedirection, the arm 96 is driven therewith by projection 98, but uponreverse rotation of the drum the arm 96 remains stationary. To preventthe possibility of reverse movement of arm 96, particularly at the endof the return movement of the drum when the sloping side of projection98 reaches and bears against the arm 96, the phonograph is preferablyprovided with stop mechanism here exemplified by the triangularlyshapedstop I 00 struck outwardly from partition 22 and best shown in Fig. 5.Arm 96 is readily moved past stop I00 in the forward direction but notin the reverse direction.

For successful operation of the mechanism thus far described, it ishighly desirable that drum 84 go through a complete revolution whichmust not'be diminished by even the amount of the Width of a stop armsuch as the stop arm 92. In fact, for safety the drum 84 may be allowedto rotate a slight amount more than a revolution. Forthis purpose thestop 94 heretofore referred to is stepped to form a part 94 spaced fromthe part 94 by an amount equal to or greater than the width of the stop92, this being best shown in Fig. 4. The part interconnecting the stops94 and 94' is located in alignment with the stop arm 92 and provides asloping or rounded approach for the stop arm. Consequently, when stoparm 92 moves in one direction, it is brushed slightly sidewardly untilitreaches the stop 94, whereas when it moves in opposite direction it isbrushed slightly sidewardly on the other side of the connecting portion95 until it reaches the stop 94. In this way thedrurnl may be given onecomplete or even slightly more than one complete revolution.

A modified form of drive mechanism is shown in Fig. 6. In this case thephonograph is actuated by a push rod |02 extending out of the casing andcarrying a push knob |04. The rod |02 is a rack meshing with a pinion|06 which is freely rotatable on record shaft 54 and which replaces thedrum 84 heretofore described. The pinion |06 carries a disc |08 having atriangular driving pawl ||0 cooperating with the arm 96 of the recordshaft. The rack |02 is guided by an extension ||2 passing through theopposite side of the casing. A compression spring ||4 around rod ||2acts to restore the rack to initial position. 'I'he rotation of pinion|06 depends upon the gear ratio between the rack and pinion, and may beadjusted to permit only a single revolution. However, if desired thepinion may be made smaller and the parts arranged for a multiple of onerevolution, say two revolutions, in which case the record is playedtwice for each operation of the push rod.

In Fig. '7 I show an even simpler form in which the record shaft 54 h-asa crank |20 mounted directly thereon. The record may beplayed'repeatedly by simply turning the crank. To prevent reverserotation of the record, the shaft 54 is provided with a slip spring |22having one end anchored on the casing at |24 and being wound about theshaft in such direction that it is loosened when the record is turned inproper direction, but is tightened and locked if attempt is made to turnthe record in reverse direction.'

It will be appreciated that if desired the crank |20 may be free fromthe record shaft and coupled thereto by an appropriate clutchtransmitting rotation in only a single direction. In such case the crankmay be turned backwardly but without causing rotation of the record.

In Figs. 9 and 10, I illustrate a modified form of phonograph whichdiffers most importantly in the mounting or suspension of the stylus. Itis desirable to make possible the manufacture of these articles at verylow cost and manufacturing tolerances must therefore be large.Furthermore, the record may not run true on the shaft. It is thereforedesirable that the stylus S be so supported as to be yieldable bothradially and axially of the record without however interfering withsuccessful sound reproduction.

In the arrangement of Figs. 9 and l0, these'results are obtained byattaching the stylus supporting spring |40 (corresponding to spring 40in Fig. 1) to a support ring |42 which extends around the speakerdiaphragm D. Ring |42 is provided with a plurality of hooks |44 in whichare caught loops |46 of a continuous rubber band |48. Band |46 extendsaround the exterior of the cas'ing C and the loops |46 are drawn intothe casing through holes |50. To prevent creeping of the band andconsequent change in adiustment or location of the stylus, the band maybe locked in place by a strip of paper |52 cemented around the band andthe exterior of the casing.

The casing is, in this instance, provided with a separate end cap |54 onwhich the elastic band is mounted. To facilitate assembly of the casing,the cylindrical part |56 thereof is slotted at |56 in registration withthe perforations |50 and the loops |46.

In order to increase the compactness of the entire phonograph unit,diaphragm D is reversely dished at the central portion |60, therebymaking possible the interposition of an elastic strut or pin |62 betweendiaphragm D and the stylus arm |38. 'I'his construction accommodates therather free oating of the stylus mounting in operation.

The drive mechanism of the phonograph here illustrated corresponds tothat shown in Figs. 1 through 5 of the drawing, but the speed controlmechanism has been simplified by elimination of the governor. Instead, adisk of felt or equivalent material |64 is placed between the record R(or the record support if the record is separate from the recordsupport) and the intermediate or partition platew |66 in the casing.'I'he record shaft is so dimensioned and mounted as to create frictionalresistance to rotation by the felt, and inasmuch as the record onlyrotates a single revolution, I nd it possible to obtain adequate speedregulation by this simple means. 'I'he felt disk construction is, ofcourse, much more inexpensive than a true governor mechanism.

It is believed that the mode of constructing and using, as well as themany advantages of my improved miniature phonograph, willbe apparentfrom the foregoing detailed description thereof.

The mechanism is simple, inexpensive, light in weight, and compact. Thesound reproduction obtained is loud and clear although of shortduration. The mechanism is devoid of means to lift and reset the stylus,and instead the stylus is permanently fixed in engagement with the soundgroove of the record. The record may be played in any position. 'Ihesound box mechanism is simplified and lightened by the use of a largediaphragm mounted across the open end of the casing. No horn orequivalent amplifying chamber is employed. The device may be used as anadvertising novelty to repeat the name of a product I or an advertisingslogan. It may also be used as a voice for a doll.

It will be apparent that while I have shown and described my inventionin preferred forms, many changes and modifications may be made in thestructures disclosed, without departing from the spirit of theinvention, defined in the following claims.

I claim:

1. A miniature phonograph comprising a record having only a singlecontinuous circular sound groove, a record shaft for supporting androtating the record, means to rotate said shaft in one direction, meansto prevent rotation of the shaft in opposite direction, a diaphragm, anda stylus connected thereto and engaging said record sound groove. l l

2. A miniature phonograph comprising a record having only a singlecontinuous circular sound groove, a record shaft for supporting androtating the record, means movable in opposite directions but arrangedfor rotating said shaft in only one direction, means to positivelyprevent rotation of the shaft in opposite direction, a speed limitingmeans, a diaphragm, and a styl'us connected thereto and permanentlylfixed in engagement with said record sound groove.

3. A phonograph comprising a compact, fiatended cylindrical casing, acone speaker diaphragm occupying and closing one end of said casing, arecord and record rotating mechanism mounted in said casing, behindsaid' diaphragm, a stylus engaging the record, and a stylus arminterconnecting the diaphragm and stylus.

4. A miniature toy phonograph comprising a: compact cylindrical casingopen at one end, a cone speaker diaphragm closing said end of thecasing, a disc record of substantial diameter arranged parallel to andbehind said diaphragm within said casing, record rotating mechanism ing,a cone speaker diaphragm at one end oi' said casing, a disc record ofsubstantial diameter arranged concentric and parallel torand behind saiddiaphragm within said casing, record rotating mechanism mounted in saidcasing between the record and the opposite end of said casing, and

a stylus arm connected at one end to the center of said diaphragm andpivoted at its opposite end near one side of the casing and carrying atthe latter end a stylus extending toward and engaging the record forlateral vibration.

6. A phonograph having a compact flat-end ed cylindrlcal'casing, a conevspeaker diaphragm mounted at and occupying one end of said casing, arecord and record moving mechanism mounted in said casing, behind saiddiaphragm, a stylus, a stylus arm interconnecting said diaphragm andstylus, said record having a single continuous' sound groove receivingthe aforesaid stylus.

'7. Aminia-ture toy phonograph having a cylindrical casing, a speakerdiaphragm mounted at and occupying one end of said casing, a record ofsubstantial diameter arranged coaxial with and behind said diaphragmwithin said casing,

record rotating mechanism mounted in said casing, a stylus, a stylus arminterconnecting said diaphragm and stylus, said record having a singlecontinuous circular sound groove receiving the aforesaid stylus.

8. A phonograph having a casing, a speaker diaphragm at one end of saidcasing, a disc record of substantial diameter arranged parallel to andbehind said diaphragm within said casing, record rotating mechanismmounted in said casing between the record and the opposite end of thecasing, a stylus arm connected at one end to said diaphragm and pivotedon a ring oatingly mounted within the casing.

9. A miniature phonograph having a cylindrical casing large in diameterrelative to its length, a speaker diaphragm closing one end of saidcasing, a disc record of substantial diameter arranged parallel to andbehind said diaphragm within said casing, record rotating mechanismmounted in said casing between the record and the opposite end of thecasing, a stylus arm connected at one end to the center of saiddiaphragm and pivotally mounted at its opposite end on a stationary leafspring and carrying at the latter end a stylus extending toward therecord, said record having a single continuous circular sound groovelocated concentrically on said record and receiving the aforesaidstylus, said stylus being permanently xed in engagement with said soundgroove.

10. A miniature phonograph comprising a cylindrical casing, a diaphragmmounted at and occupying one end of said casing, a record, govornormeans rotatable therewith and including a pair of oppositely disposedWeight arms interconnected by a link for simultaneous movement, one ofsaid Weight amis carrying a brake shoe adapted to run on and contactwith the inside of said cylindrical casing, and means to drive saidrecord.

1l. A phonograph 'having a casing, a speaker diaphragm at one end o saidcasing, a record and record support of substantial diameter arrangedparallel to and behind said diaphragm within said casing, a stylus, astylus arm connected to said diaphragm and stylus, said record having asingle continuous circular sound groove located concentrically on saidrecord and receiving the aforesaid stylus, governor means including apair of oppositely disposed weight arms pivotally mounted on said recordsupport and interconnected by a link for simultaneous movement, one ofsaid Weight arms carrying a brake shoe, andmeans to drive said record.

12. A toy phonograph having a compact cylindrical casing, a speakerdiaphragm mounted at and occupying one end of said casing, a recordbehind said diaphragm within said casing, a stylus arm connected to saiddiaphragm and carrying a stylus extending toward the record, said recordhaving a single continuous circular sound groove receiving the aforesaidstylus, and means to drive said record, said means including a iiatdrum, a pull cord wound on said drum and extending out of the casing, aspring connected to said drum, and means ,causing said drum to rotatethe record in one direction only.

13. A miniature phonograph having a casing, a speaker diaphragmclosingone end of said casing, a record of substantial diameter arrangedparallel to and behind said diaphragm within said casing, a stylus armconnected to said diaphragm and carrying a stylus extending toward therecord, said record having a single sound groove receiving the aforesaidstylus, and means to drive said record, said means including a flat drumbehind said record, a pull cord wound on said drum and extending out ofthe casing, a stop for limiting the rotation of the drum to a. singlerevolution, a cord take-up spring connect.- ed to said drum, and meanscausing said drum to rotate the record in one direction only.

14. A miniature phonograph having a cylindrical casing large in diameterrelative to its length, a speaker diaphragm` closing one end of saidcasing, a disc record and record support of substantial diameterarranged parallel to and behind said diaphragm within said casing, astylus arm connected at one end to the center of said diaphragm andpivoted on a ring floatingly held by elastic means extending from thering to the casing Wall, said record having a single circular soundgroove permanently receiving said stylus, and means to rotate therecord.

15. A miniature toy phonograph having a compact casing, a speakerdiaphragm at one end of said casing, a record behind said diaphragmwithin said casing, a stylus arm connected to said diaphragm andcarrying a stylus extending toward the record, said record having asingle continuous circular sound groove receiving the aforesaid stylus,and means to drive said record, said means including a reciprocable rackhaving an actuating knob extending out of the casing, and a pinionmeshing with said rack.

16. A miniature phonograph having a compact cylindrical casing, aspeaker diaphragm closing one end of said casing, a record ofsubstantialdiameter arranged behind said diaphragm within said casing, a stylus armconnected to said diaphragm and carrying a stylus extending toward therecord, said record having a single continuous circular sound groovereceiving the aforesaid stylus, and means to drive said record, saidmeans including a reciprocable rack having an actuating knob extendingout of the casing, a pinion meshing with said rack, and meansinterconnecting the pinion and record for rotation of the record in onlyone direction.

17. A miniature toy phonograph having a compact cylindrical casing, acone speaker diaphragm at one end of said casing, a record behind andparallel to said diaphragm within said casing, a stylus arm connected tosaid diaphragm and carrying a stylus extending toward the record, saidcarrying a stylus extending toward the record,

said record having a single continuous circular sound groove receivingthe aforesaid stylus, speed limiting means rotatable with said recordsupport, and means to drive said record, said means including a crank,means coupling the same to said record, and means preventing rotation ofsaid record in reverse direction.

19. A toy phonograph having a compact cylindrical casing, a speaker4diaphragm mounted at and occupying one end of said casing, a recordbehind said diaphragm within the casing, a stylus arm connected to saiddiaphragm and carrying a stylus extending toward the record, and meansto drive said record, said means including a at drum mounted behind saidrecord, a pull cord wound on said drum and extending out of the casing,and a spring connected to said drum, said casing, diaphragm, record; anddrum all being arranged coaxially.

20. A toy phonograph having a compact cylindrical casing, a cone speakerdiaphragm mounted at and occupying one end of said casing, a record ofsubstantial diameter behindv said diaphragm within the casing, a stylusarm connected to said diaphragm and carrying a stylus extending towardthe record, said record having asingle continuous circular sound groovereceiving the aforesaid stylus, and means to drive said record, saidmeans including a fiat drum mounted behind said record, a pull cordwound on said drum and extending out of the casing, a spring connectedto said drum, and means causing said drum to rol- V tate the record inone direction only, said casing, diaphragm, record, and drum al1 beingarranged A coaxially.

21. A miniature phonograph having a compact cylindrical casing, aspeaker diaphragm closing one end of said casing, a record arrangedbehind said diaphragm within said casing, a stylus arm connected'to saiddiaphragm and carrying' a stylus extending toward the record, and meansto drive said record, said means including a reciprocable rack having anactuating knob extending out of the casing, a pinion meshing with saidrack, and means interconnecting the pinion and record for rotation ofthe record, said casing, diaphragm, record, and pinion all beingarranged coaxially.

22. A miniature phonograph having a compact cylindrical casing, a conespeaker diaphragm closing one end of said casing, a record ofsubstantial diameter arranged behind said diaphragm within said casing,a stylus arm connected to said diaphragm and carrying astylus extendingtoward the record, said record having a single continuous circular soundgroove receiving the aforesaid stylus, and means to drive said record,`said means including a reciprocable rack having an actuating knobextending out of the casing, a pinion meshing with said rack,` and meansinterconnecting the pinion and record for rotation of the record in onlyone direction, said casing, diaphragm, record,

and pinion allbeing arranged coaxially.

23. A miniature toy phonograph having a compact cylindrical casing, aspeaker diaphragm at one end of said casing, a record behind andparallel to said diaphragm within said casing, a stylus arm connected tosaid diaphragm and carrying a stylus extending toward the record, a

crank projecting from the casing for driving the record, and meanspreventing rotation of the record in reverse direction, said casing,dia-V phragm, record, a-nd crank all being arranged coaxially.

- 24. A miniature toy phonograph having a compact cylindrical casing, acone speaker diaphragm at one end of said casing, a record ofsubstantial diameter mounted behind Aand parallel to saidv diaphragmwithin said casing, a stylus arm connected to said diaphragm andcarrying a stylus extending toward the record, s aid record having asingle continuous sound groove receiving the aforesaid stylus, a crankprojecting from the casing for driving the record,` and means preventingrotation of the record in reverse direction,

said casing, diaphragm', record, and crank all being arrangedcoaxially.`

25. A miniature toy phonograph having a cylindrical casing, a speakerdiaphragm closing one end of said casing, a disc-record and recordsupport arranged parallel to and behind said diaphragm within saidcasing, a stylus arm connected at one end to the center of saiddiaphragm and pivotedon a large-diameter ring iloatingly held by elasticmeans extending from the ring to the casing wall, and means mountedbehind said record for rotating the same, said casing, diaphragm, ring,record, and record rotating means all being arranged coaxially.

26; A miniature toy phonograph having a cylin- 'drical casing large indiameter relative to its length, a cone speaker diaphragm closing oneend of said casing, `a disc record and record support of substantialdiameter arranged parallel toand behind said diaphragm within saidcasing, a stylus arm connected at one end to the center of saiddiaphragm and pivoted on a large-diameter ring fioatingly held byelastic means extending includinga fiat drum, a pull cord wound on saiddrum and extending out of the casing, a spring connected to said'drum,and means causing said drum to rotate the record in one direction only,said casing, diaphragm, ring, record, and drum all being arrangedcoaxially.

JOHN H. WILHELM.

